INFO: task syz-executor.1:6887 blocked for more than 430 seconds. Not tainted 6.8.0-rc1-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:0 pid:6887 tgid:6883 ppid:1250 flags:0x00000005 Backtrace: [<81857a24>] (__schedule) from [<8185865c>] (__schedule_loop kernel/sched/core.c:6802 [inline]) [<81857a24>] (__schedule) from [<8185865c>] (schedule+0x2c/0xb8 kernel/sched/core.c:6817) r10:eac31bd4 r9:82604fe0 r8:82604ec0 r7:00000000 r6:00000002 r5:00000000 r4:84271800 [<81858630>] (schedule) from [<81858744>] (io_schedule+0x38/0x48 kernel/sched/core.c:9023) r5:00000000 r4:84271800 [<8185870c>] (io_schedule) from [<8041fcd4>] (folio_wait_bit_common+0x190/0x3a8 mm/filemap.c:1274) r5:84271800 r4:00000002 [<8041fb44>] (folio_wait_bit_common) from [<80422ed4>] (folio_put_wait_locked mm/filemap.c:1438 [inline]) [<8041fb44>] (folio_wait_bit_common) from [<80422ed4>] (do_read_cache_folio+0x98/0x248 mm/filemap.c:3685) r10:97519480 r9:00080001 r8:00000000 r7:8075a564 r6:00000000 r5:83089478 r4:dded901c [<80422e3c>] (do_read_cache_folio) from [<804230a0>] (read_cache_folio+0x1c/0x24 mm/filemap.c:3735) r10:97519480 r9:00000002 r8:00000000 r7:00000000 r6:80781274 r5:97519480 r4:00000000 r3:00000000 [<80423084>] (read_cache_folio) from [<8078107c>] (read_mapping_folio include/linux/pagemap.h:894 [inline]) [<80423084>] (read_cache_folio) from [<8078107c>] (read_part_sector+0x58/0xd0 block/partitions/core.c:726) [<80781024>] (read_part_sector) from [<807812dc>] (msdos_partition+0x68/0xafc block/partitions/msdos.c:592) r5:97519480 r4:8389de00 [<80781274>] (msdos_partition) from [<80780998>] (check_partition block/partitions/core.c:138 [inline]) [<80781274>] (msdos_partition) from [<80780998>] (blk_add_partitions block/partitions/core.c:593 [inline]) [<80781274>] (msdos_partition) from [<80780998>] (bdev_disk_changed+0x2d0/0x69c block/partitions/core.c:697) r10:00000001 r9:81aeb2fc r8:00000000 r7:8389de30 r6:80781274 r5:97519480 r4:8389de00 [<807806c8>] (bdev_disk_changed) from [<807590e4>] (blkdev_get_whole+0xa4/0xb4 block/bdev.c:661) r10:8389df2c r9:8389de00 r8:00000000 r7:00000000 r6:8389de00 r5:00000000 r4:83089100 [<80759040>] (blkdev_get_whole) from [<8075a00c>] (bdev_open_by_dev+0x368/0x42c block/bdev.c:871) r7:00000000 r6:83089100 r5:975186c0 r4:00000001 [<80759ca4>] (bdev_open_by_dev) from [<8077bd74>] (disk_scan_partitions+0x6c/0xe4 block/genhd.c:369) r10:84271800 r9:00000003 r8:00000000 r7:8389df28 r6:00000000 r5:00000001 r4:8389de00 [<8077bd08>] (disk_scan_partitions) from [<8077b130>] (blkdev_common_ioctl block/ioctl.c:559 [inline]) [<8077bd08>] (disk_scan_partitions) from [<8077b130>] (blkdev_ioctl+0x97c/0xf3c block/ioctl.c:628) r9:00000003 r8:82ec0cc0 r7:00000001 r6:00000000 r5:83089100 r4:0000125f [<8077a7b4>] (blkdev_ioctl) from [<80502028>] (vfs_ioctl fs/ioctl.c:51 [inline]) [<8077a7b4>] (blkdev_ioctl) from [<80502028>] (do_vfs_ioctl fs/ioctl.c:831 [inline]) [<8077a7b4>] (blkdev_ioctl) from [<80502028>] (__do_sys_ioctl fs/ioctl.c:869 [inline]) [<8077a7b4>] (blkdev_ioctl) from [<80502028>] (sys_ioctl+0x118/0xb58 fs/ioctl.c:857) r10:84271800 r9:00000003 r8:82ec0cc0 r7:00000000 r6:82ec0cc1 r5:00000000 r4:0000125f [<80501f10>] (sys_ioctl) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:66) Exception stack(0xeac31fa8 to 0xeac31ff0) 1fa0: 00000000 00000000 00000003 0000125f 00000000 00000000 1fc0: 00000000 00000000 0014c358 00000036 7ed77326 7ed77327 003d0f00 76b420fc 1fe0: 76b41f08 76b41ef8 000167e8 00050bd0 r10:00000036 r9:84271800 r8:80200288 r7:00000036 r6:0014c358 r5:00000000 r4:00000000 NMI backtrace for cpu 1 CPU: 1 PID: 30 Comm: khungtaskd Not tainted 6.8.0-rc1-syzkaller #0 Hardware name: ARM-Versatile Express Backtrace: [<818365cc>] (dump_backtrace) from [<818366c8>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:256) r7:00000000 r6:00000113 r5:60000193 r4:81fbd200 [<818366b0>] (show_stack) from [<81853bbc>] (__dump_stack lib/dump_stack.c:88 [inline]) [<818366b0>] (show_stack) from [<81853bbc>] (dump_stack_lvl+0x48/0x54 lib/dump_stack.c:106) [<81853b74>] (dump_stack_lvl) from [<81853be0>] (dump_stack+0x18/0x1c lib/dump_stack.c:113) r5:00000001 r4:00000001 [<81853bc8>] (dump_stack) from [<818239f8>] (nmi_cpu_backtrace+0x160/0x17c lib/nmi_backtrace.c:113) [<81823898>] (nmi_cpu_backtrace) from [<81823b44>] (nmi_trigger_cpumask_backtrace+0x130/0x1d8 lib/nmi_backtrace.c:62) r7:00000001 r6:8260c494 r5:8261a7d8 r4:ffffffff [<81823a14>] (nmi_trigger_cpumask_backtrace) from [<80210574>] (arch_trigger_cpumask_backtrace+0x18/0x1c arch/arm/kernel/smp.c:851) r9:827d8cdf r8:82894eb8 r7:8260c5ec r6:00007f23 r5:8261adc8 r4:82fbcb2c [<8021055c>] (arch_trigger_cpumask_backtrace) from [<80347e54>] (trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]) [<8021055c>] (arch_trigger_cpumask_backtrace) from [<80347e54>] (check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]) [<8021055c>] (arch_trigger_cpumask_backtrace) from [<80347e54>] (watchdog+0x48c/0x59c kernel/hung_task.c:379) [<803479c8>] (watchdog) from [<8026e888>] (kthread+0x104/0x134 kernel/kthread.c:388) r10:00000000 r9:df819e58 r8:82e67440 r7:00000000 r6:803479c8 r5:82ee1800 r4:82f458c0 [<8026e784>] (kthread) from [<80200104>] (ret_from_fork+0x14/0x30 arch/arm/kernel/entry-common.S:134) Exception stack(0xdf8d9fb0 to 0xdf8d9ff8) 9fa0: 00000000 00000000 00000000 00000000 9fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 9fe0: 00000000 00000000 00000000 00000000 00000013 00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:8026e784 r4:82f458c0 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 8457 Comm: syz-executor.1 Not tainted 6.8.0-rc1-syzkaller #0 Hardware name: ARM-Versatile Express PC is at 0x16900 LR is at 0x16900 pc : [<00016900>] lr : [<00016900>] psr: 20000010 sp : 200013d0 ip : 200013d0 fp : 76b020fc r10: 003d0f00 r9 : 7e8b3327 r8 : 7e8b3326 r7 : 00000000 r6 : 00000000 r5 : 00000000 r4 : 00000000 r3 : 00000000 r2 : 000001b0 r1 : 00000004 r0 : ffffffff Flags: nzCv IRQs on FIQs on Mode USER_32 ISA ARM Segment user Control: 30c5387d Table: 964c1140 DAC: fffffffd Backtrace: invalid frame pointer 0x76b020fc