ci2 starts bisection 2026-10-15 00:49:32.58585576 +0000 UTC m=+103.359671185 bisecting fixing commit since d64a499eea6b62b5121beceed9e8a1f57b00d863 building syzkaller on 2f52988a5879f3555760033c428966d32bb70b84 ensuring issue is reproducible on original commit d64a499eea6b62b5121beceed9e8a1f57b00d863 testing commit d64a499eea6b62b5121beceed9e8a1f57b00d863 gcc compiler: Debian clang version 22.1.8 (1~deb13u4), Debian LLD 22.1.8 kernel signature: 5651e01fc1cbaa61470b8bfd80155006f1c20d6b2afe8c21ca10e2c887e38b7f all runs: crashed: WARNING in ext2_new_blocks representative crash: WARNING in ext2_new_blocks, types: [WARNING] check whether we can drop unnecessary instrumentation disabling configs for [ubsan kasan locking atomic_sleep hang memleak], they are not needed testing commit d64a499eea6b62b5121beceed9e8a1f57b00d863 gcc compiler: Debian clang version 22.1.8 (1~deb13u4), Debian LLD 22.1.8 kernel signature: b7b327a6b9def0db17c9ad574b9302d9bd88c4d7983249dcc2e736ea93434fd1 all runs: crashed: WARNING in ext2_new_blocks representative crash: WARNING in ext2_new_blocks, types: [WARNING] the bug reproduces without the instrumentation disabling configs for [ubsan kasan locking atomic_sleep hang memleak], they are not needed kconfig minimization: base=7508 full=9788 leaves diff=2007 split chunks (needed=false): <2007> split chunk #0 of len 2007 into 5 parts testing without sub-chunk 1/5 disabling configs for [hang memleak ubsan kasan locking atomic_sleep], they are not needed testing commit d64a499eea6b62b5121beceed9e8a1f57b00d863 gcc compiler: Debian clang version 22.1.8 (1~deb13u4), Debian LLD 22.1.8 kernel signature: 963de232b58440b42fe4cf96592fb8d6bcde1d99805ec664b806b5db09ab030e all runs: crashed: WARNING in ext2_new_blocks representative crash: WARNING in ext2_new_blocks, types: [WARNING] the chunk can be dropped testing without sub-chunk 2/5 disabling configs for [hang memleak ubsan kasan locking atomic_sleep], they are not needed testing commit d64a499eea6b62b5121beceed9e8a1f57b00d863 gcc compiler: Debian clang version 22.1.8 (1~deb13u4), Debian LLD 22.1.8 kernel signature: b738f8ae0ed7eff7bae20b05700264b630e5fbd3afadf1eb0df96e5663feaced all runs: crashed: WARNING in ext2_new_blocks representative crash: WARNING in ext2_new_blocks, types: [WARNING] the chunk can be dropped testing without sub-chunk 3/5 disabling configs for [locking atomic_sleep hang memleak ubsan kasan], they are not needed testing commit d64a499eea6b62b5121beceed9e8a1f57b00d863 gcc compiler: Debian clang version 22.1.8 (1~deb13u4), Debian LLD 22.1.8 kernel signature: de940ac963caf7811dbc6ff0f00717f1b6f7ea1b385d3f468ea65fe47799b38f all runs: crashed: WARNING in ext2_new_blocks representative crash: WARNING in ext2_new_blocks, types: [WARNING] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [kasan locking atomic_sleep hang memleak ubsan], they are not needed testing commit d64a499eea6b62b5121beceed9e8a1f57b00d863 gcc compiler: Debian clang version 22.1.8 (1~deb13u4), Debian LLD 22.1.8 kernel signature: 58d5e6c32f6a275ce3bb5c7022e2b7043b0e8de85e2c020036b8647f33cf9736 all runs: crashed: WARNING in ext2_new_blocks representative crash: WARNING in ext2_new_blocks, types: [WARNING] the chunk can be dropped testing without sub-chunk 5/5 disabling configs for [atomic_sleep hang memleak ubsan kasan locking], they are not needed testing commit d64a499eea6b62b5121beceed9e8a1f57b00d863 gcc compiler: Debian clang version 22.1.8 (1~deb13u4), Debian LLD 22.1.8 kernel signature: 53208e6d883a1b102b8c4416855c5e8635fc43c01fd79d129a83b4220ea0c4c7 all runs: crashed: WARNING in ext2_new_blocks representative crash: WARNING in ext2_new_blocks, types: [WARNING] the chunk can be dropped disabling configs for [locking atomic_sleep hang memleak ubsan kasan], they are not needed testing current HEAD a500ba24937a966eab140b95eac42782a7ce2c85 testing commit a500ba24937a966eab140b95eac42782a7ce2c85 gcc compiler: Debian clang version 22.1.8 (1~deb13u4), Debian LLD 22.1.8 kernel signature: baaee1a93cc3aa4b87ceb7f3d0447bbd2fe9bc76b416d48db91c9f005d25b726 all runs: crashed: WARNING in ext2_new_blocks representative crash: WARNING in ext2_new_blocks, types: [WARNING] crash still not fixed/happens on the oldest tested release revisions tested: 8, total time: 4h15m34.318632512s (build: 1h11m56.391181234s, test: 1h4m38.302312443s) crash still not fixed or there were kernel test errors commit msg: Linux 6.1.189 crash: WARNING in ext2_new_blocks ext2 filesystem being mounted at /0/file0 supports timestamps until 2038-01-19 (0x7fffffff) ------------[ cut here ]------------ block_group >= groups_count - block_group = 7, groups_count = 1 WARNING: CPU: 0 PID: 3004 at fs/ext2/balloc.c:51 ext2_get_group_desc fs/ext2/balloc.c:49 [inline] WARNING: CPU: 0 PID: 3004 at fs/ext2/balloc.c:51 ext2_new_blocks+0x418/0x564 fs/ext2/balloc.c:1280 Modules linked in: CPU: 0 PID: 3004 Comm: syz.2.17 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) pc : ext2_get_group_desc fs/ext2/balloc.c:49 [inline] pc : ext2_new_blocks+0x418/0x564 fs/ext2/balloc.c:1280 lr : ext2_get_group_desc fs/ext2/balloc.c:49 [inline] lr : ext2_new_blocks+0x418/0x564 fs/ext2/balloc.c:1280 sp : ffff80001280b8f0 x29: ffff80001280b940 x28: 0000000000010000 x27: 0000000000000008 x26: ffff0000d41a6400 x25: 0000000000010000 x24: ffff80001280b9f4 x23: ffff0000c9dd8000 x22: 0000000000000000 x21: ffff80001280b9f8 x20: ffff0000c4292c00 x19: ffff0000c8e78718 x18: 000000000007fc00 x17: 0000000000000001 x16: 0000000000000000 x15: 0000000000000126 x14: 00000000000f9b5d x13: 00000000023635de x12: ffff80000e90c000 x11: 0000000000000003 x10: 00000000ffffffff x9 : 9fb4704f66972d00 x8 : 9fb4704f66972d00 x7 : 0000000000000000 x6 : ffff8000080d5cfc x5 : 0000000000000000 x4 : 0000000000000080 x3 : 0000000000000000 x2 : 0000000000000000 x1 : ffff80000a5f9172 x0 : 0000000000000001 Call trace: ext2_get_group_desc fs/ext2/balloc.c:49 [inline] ext2_new_blocks+0x418/0x564 fs/ext2/balloc.c:1280 ext2_alloc_blocks fs/ext2/inode.c:418 [inline] ext2_alloc_branch fs/ext2/inode.c:487 [inline] ext2_get_blocks+0x4b4/0x9b0 fs/ext2/inode.c:730 ext2_get_block+0x58/0x158 fs/ext2/inode.c:787 __block_write_begin_int+0x10c/0x6f0 fs/buffer.c:1991 __block_write_begin fs/buffer.c:2041 [inline] block_write_begin+0x5c/0xa4 fs/buffer.c:2102 ext2_write_begin+0x40/0x6c fs/ext2/inode.c:903 generic_perform_write+0x80/0x1e4 mm/filemap.c:3862 __generic_file_write_iter+0x7c/0xc0 mm/filemap.c:3960 generic_file_write_iter+0x50/0xd4 mm/filemap.c:3989 ext2_file_write_iter+0x10/0x1c fs/ext2/file.c:179 call_write_iter include/linux/fs.h:2271 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x1ac/0x2c4 fs/read_write.c:584 ksys_pwrite64 fs/read_write.c:699 [inline] __do_sys_pwrite64 fs/read_write.c:709 [inline] __se_sys_pwrite64 fs/read_write.c:706 [inline] __arm64_sys_pwrite64+0x84/0xc8 fs/read_write.c:706 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x40/0xdc arch/arm64/kernel/syscall.c:52 el0_svc_common+0xb0/0xe8 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x24/0x80 arch/arm64/kernel/syscall.c:204 el0_svc+0x34/0xd4 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ block_group >= groups_count - block_group = 207715, groups_count = 1 WARNING: CPU: 0 PID: 3004 at fs/ext2/balloc.c:51 ext2_get_group_desc fs/ext2/balloc.c:-1 [inline] WARNING: CPU: 0 PID: 3004 at fs/ext2/balloc.c:51 read_block_bitmap+0xec/0x224 fs/ext2/balloc.c:136 Modules linked in: CPU: 0 PID: 3004 Comm: syz.2.17 Tainted: G W syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) pc : ext2_get_group_desc fs/ext2/balloc.c:-1 [inline] pc : read_block_bitmap+0xec/0x224 fs/ext2/balloc.c:136 lr : ext2_get_group_desc fs/ext2/balloc.c:49 [inline] lr : read_block_bitmap+0xe8/0x224 fs/ext2/balloc.c:136 sp : ffff80001280ba50 x29: ffff80001280ba50 x28: ffff0000c575d400 x27: 0000000000000000 x26: 0000000000032b63 x25: 0000000000000001 x24: 0000000000002000 x23: 0000000000032b63 x22: 0000000000000c60 x21: 00000000656c6c61 x20: 0000000000000000 x19: ffff0000c9dd8000 x18: 0000000000002000 x17: 0000000000000001 x16: 0000000000000000 x15: 000000000000009a x14: 00000000000fc77b x13: 000000000298979b x12: ffff80000e90c000 x11: 0000000000000004 x10: 00000000ffffffff x9 : 9fb4704f66972d00 x8 : 9fb4704f66972d00 x7 : 0000000000000000 x6 : ffff8000080d5cfc x5 : 0000000000000000 x4 : 0000000000000080 x3 : 0000000000000000 x2 : 0000000000000000 x1 : ffff80000a5f9172 x0 : 0000000000000000 Call trace: ext2_get_group_desc fs/ext2/balloc.c:-1 [inline] read_block_bitmap+0xec/0x224 fs/ext2/balloc.c:136 ext2_free_blocks+0x104/0x368 fs/ext2/balloc.c:521 ext2_free_data fs/ext2/inode.c:1099 [inline] __ext2_truncate_blocks+0xb8/0x550 fs/ext2/inode.c:1190 ext2_truncate_blocks fs/ext2/inode.c:1259 [inline] ext2_write_failed+0xa4/0xc0 fs/ext2/inode.c:65 ext2_write_begin+0x54/0x6c fs/ext2/inode.c:905 generic_perform_write+0x80/0x1e4 mm/filemap.c:3862 __generic_file_write_iter+0x7c/0xc0 mm/filemap.c:3960 generic_file_write_iter+0x50/0xd4 mm/filemap.c:3989 ext2_file_write_iter+0x10/0x1c fs/ext2/file.c:179 call_write_iter include/linux/fs.h:2271 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x1ac/0x2c4 fs/read_write.c:584 ksys_pwrite64 fs/read_write.c:699 [inline] __do_sys_pwrite64 fs/read_write.c:709 [inline] __se_sys_pwrite64 fs/read_write.c:706 [inline] __arm64_sys_pwrite64+0x84/0xc8 fs/read_write.c:706 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x40/0xdc arch/arm64/kernel/syscall.c:52 el0_svc_common+0xb0/0xe8 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x24/0x80 arch/arm64/kernel/syscall.c:204 el0_svc+0x34/0xd4 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ block_group >= groups_count - block_group = 3, groups_count = 1 WARNING: CPU: 0 PID: 3004 at fs/ext2/balloc.c:51 ext2_get_group_desc fs/ext2/balloc.c:-1 [inline] WARNING: CPU: 0 PID: 3004 at fs/ext2/balloc.c:51 read_block_bitmap+0xec/0x224 fs/ext2/balloc.c:136 Modules linked in: CPU: 0 PID: 3004 Comm: syz.2.17 Tainted: G W syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) pc : ext2_get_group_desc fs/ext2/balloc.c:-1 [inline] pc : read_block_bitmap+0xec/0x224 fs/ext2/balloc.c:136 lr : ext2_get_group_desc fs/ext2/balloc.c:49 [inline] lr : read_block_bitmap+0xe8/0x224 fs/ext2/balloc.c:136 sp : ffff80001280ba50 x29: ffff80001280ba50 x28: ffff0000c575d400 x27: 0000000000000000 x26: 0000000000000003 x25: 0000000000000001 x24: 0000000000002000 x23: 0000000000000003 x22: 0000000000001371 x21: 0000000000007372 x20: 0000000000000000 x19: ffff0000c9dd8000 x18: 0000000000000000 x17: ffff8000099bd734 x16: 0000000000000001 x15: 000000000000ba7e x14: 00000000000be82f x13: 000000000282a8e8 x12: ffff80000e90c000 x11: 0000000000000004 x10: 00000000ffffffff x9 : 9fb4704f66972d00 x8 : 9fb4704f66972d00 x7 : 0000000000000000 x6 : ffff8000080d5cfc x5 : 0000000000000000 x4 : 0000000000000080 x3 : 0000000000000000 x2 : 0000000000000000 x1 : ffff80000a5f9172 x0 : 0000000000000000 Call trace: ext2_get_group_desc fs/ext2/balloc.c:-1 [inline] read_block_bitmap+0xec/0x224 fs/ext2/balloc.c:136 ext2_free_blocks+0x104/0x368 fs/ext2/balloc.c:521 ext2_free_data fs/ext2/inode.c:1099 [inline] __ext2_truncate_blocks+0xb8/0x550 fs/ext2/inode.c:1190 ext2_truncate_blocks fs/ext2/inode.c:1259 [inline] ext2_write_failed+0xa4/0xc0 fs/ext2/inode.c:65 ext2_write_begin+0x54/0x6c fs/ext2/inode.c:905 generic_perform_write+0x80/0x1e4 mm/filemap.c:3862 __generic_file_write_iter+0x7c/0xc0 mm/filemap.c:3960 generic_file_write_iter+0x50/0xd4 mm/filemap.c:3989 ext2_file_write_iter+0x10/0x1c fs/ext2/file.c:179 call_write_iter include/linux/fs.h:2271 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x1ac/0x2c4 fs/read_write.c:584 ksys_pwrite64 fs/read_write.c:699 [inline] __do_sys_pwrite64 fs/read_write.c:709 [inline] __se_sys_pwrite64 fs/read_write.c:706 [inline] __arm64_sys_pwrite64+0x84/0xc8 fs/read_write.c:706 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x40/0xdc arch/arm64/kernel/syscall.c:52 el0_svc_common+0xb0/0xe8 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x24/0x80 arch/arm64/kernel/syscall.c:204 el0_svc+0x34/0xd4 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ block_group >= groups_count - block_group = 7, groups_count = 1 WARNING: CPU: 0 PID: 3004 at fs/ext2/balloc.c:51 ext2_get_group_desc fs/ext2/balloc.c:-1 [inline] WARNING: CPU: 0 PID: 3004 at fs/ext2/balloc.c:51 read_block_bitmap+0xec/0x224 fs/ext2/balloc.c:136 Modules linked in: CPU: 0 PID: 3004 Comm: syz.2.17 Tainted: G W syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) pc : ext2_get_group_desc fs/ext2/balloc.c:-1 [inline] pc : read_block_bitmap+0xec/0x224 fs/ext2/balloc.c:136 lr : ext2_get_group_desc fs/ext2/balloc.c:49 [inline] lr : read_block_bitmap+0xe8/0x224 fs/ext2/balloc.c:136 sp : ffff80001280ba50 x29: ffff80001280ba50 x28: ffff0000c575d400 x27: 0000000000000000 x26: 0000000000000007 x25: 0000000000000001 x24: 0000000000002000 x23: 0000000000000007 x22: 0000000000001fff x21: 0000000000010000 x20: 0000000000000000 x19: ffff0000c9dd8000 x18: ffff80000a3f7ee1 x17: 0000000000000001 x16: ffffffffffffffff x15: 0000000000000003 x14: ffff80000a96b270 x13: 0000000000000003 x12: 0000000000000003 x11: 00000000ffffefff x10: ffff80000a901be4 x9 : 9fb4704f66972d00 x8 : 9fb4704f66972d00 x7 : 0000000000000000 x6 : ffff80000997ce44 x5 : 0000000000000000 x4 : 0000000000000080 x3 : 0000000000000000 x2 : 0000000000000000 x1 : ffff80000a3f7ee1 x0 : 0000000000000000 Call trace: ext2_get_group_desc fs/ext2/balloc.c:-1 [inline] read_block_bitmap+0xec/0x224 fs/ext2/balloc.c:136 ext2_free_blocks+0x104/0x368 fs/ext2/balloc.c:521 ext2_free_data fs/ext2/inode.c:1108 [inline] __ext2_truncate_blocks+0x154/0x550 fs/ext2/inode.c:1190 ext2_truncate_blocks fs/ext2/inode.c:1259 [inline] ext2_write_failed+0xa4/0xc0 fs/ext2/inode.c:65 ext2_write_begin+0x54/0x6c fs/ext2/inode.c:905 generic_perform_write+0x80/0x1e4 mm/filemap.c:3862 __generic_file_write_iter+0x7c/0xc0 mm/filemap.c:3960 generic_file_write_iter+0x50/0xd4 mm/filemap.c:3989 ext2_file_write_iter+0x10/0x1c fs/ext2/file.c:179 call_write_iter include/linux/fs.h:2271 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x1ac/0x2c4 fs/read_write.c:584 ksys_pwrite64 fs/read_write.c:699 [inline] __do_sys_pwrite64 fs/read_write.c:709 [inline] __se_sys_pwrite64 fs/read_write.c:706 [inline] __arm64_sys_pwrite64+0x84/0xc8 fs/read_write.c:706 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x40/0xdc arch/arm64/kernel/syscall.c:52 el0_svc_common+0xb0/0xe8 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x24/0x80 arch/arm64/kernel/syscall.c:204 el0_svc+0x34/0xd4 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 ---[ end trace 0000000000000000 ]---