bisecting cause commit starting from b9d3d01405061bb42358fe53f824e894a1922ced building syzkaller on 598ca6c8b8766304c3b2865e38f5f301c39bd299 testing commit b9d3d01405061bb42358fe53f824e894a1922ced with gcc (GCC) 8.1.0 all runs: crashed: WARNING in exfat_bdev_read testing release v5.3 testing commit 4d856f72c10ecb060868ed10ff1b1453943fc6c8 with gcc (GCC) 8.1.0 all runs: OK # git bisect start b9d3d01405061bb42358fe53f824e894a1922ced 4d856f72c10ecb060868ed10ff1b1453943fc6c8 Bisecting: 14556 revisions left to test after this (roughly 14 steps) [d4b5b2295a468bca42dc2301ae866fcd7ffccf93] Merge branch 'arm/dt' into for-next testing commit d4b5b2295a468bca42dc2301ae866fcd7ffccf93 with gcc (GCC) 8.1.0 all runs: crashed: WARNING in bdev_read # git bisect bad d4b5b2295a468bca42dc2301ae866fcd7ffccf93 Bisecting: 7189 revisions left to test after this (roughly 13 steps) [81160dda9a7aad13c04e78bb2cfd3c4630e3afab] Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next testing commit 81160dda9a7aad13c04e78bb2cfd3c4630e3afab with gcc (GCC) 8.1.0 all runs: crashed: WARNING in bdev_read # git bisect bad 81160dda9a7aad13c04e78bb2cfd3c4630e3afab Bisecting: 3707 revisions left to test after this (roughly 12 steps) [04cbfba6208592999d7bfe6609ec01dc3fde73f5] Merge tag 'dmaengine-5.4-rc1' of git://git.infradead.org/users/vkoul/slave-dma testing commit 04cbfba6208592999d7bfe6609ec01dc3fde73f5 with gcc (GCC) 8.1.0 all runs: OK # git bisect good 04cbfba6208592999d7bfe6609ec01dc3fde73f5 Bisecting: 1853 revisions left to test after this (roughly 11 steps) [e69e9db9031b2ef4897cfafb9a496f8eb6724e14] nfp: nsp: add support for hwinfo set operation testing commit e69e9db9031b2ef4897cfafb9a496f8eb6724e14 with gcc (GCC) 8.1.0 all runs: OK # git bisect good e69e9db9031b2ef4897cfafb9a496f8eb6724e14 Bisecting: 787 revisions left to test after this (roughly 10 steps) [e6874fc29410fabfdbc8c12b467f41a16cbcfd2b] Merge tag 'staging-5.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging testing commit e6874fc29410fabfdbc8c12b467f41a16cbcfd2b with gcc (GCC) 8.1.0 all runs: crashed: WARNING in bdev_read # git bisect bad e6874fc29410fabfdbc8c12b467f41a16cbcfd2b Bisecting: 584 revisions left to test after this (roughly 9 steps) [c6b48dad92aedaa9bdc013ee495cb5b1bbdf1f11] Merge tag 'usb-5.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb testing commit c6b48dad92aedaa9bdc013ee495cb5b1bbdf1f11 with gcc (GCC) 8.1.0 all runs: OK # git bisect good c6b48dad92aedaa9bdc013ee495cb5b1bbdf1f11 Bisecting: 292 revisions left to test after this (roughly 8 steps) [c391818a10def7f5aa989842892a4306e75c917d] staging: fsl-dpaa2/ethsw: do not force user to bring interface down testing commit c391818a10def7f5aa989842892a4306e75c917d with gcc (GCC) 8.1.0 all runs: OK # git bisect good c391818a10def7f5aa989842892a4306e75c917d Bisecting: 146 revisions left to test after this (roughly 7 steps) [44f6b40c225eb8e82eba8fd96d8f3fb843bc5a09] staging: exfat: stop using 32-bit time_t testing commit 44f6b40c225eb8e82eba8fd96d8f3fb843bc5a09 with gcc (GCC) 8.1.0 all runs: crashed: WARNING in bdev_read # git bisect bad 44f6b40c225eb8e82eba8fd96d8f3fb843bc5a09 Bisecting: 72 revisions left to test after this (roughly 6 steps) [329101244f214952606359d254ae883b7109e1a5] staging: greybus: light: fix a couple double frees testing commit 329101244f214952606359d254ae883b7109e1a5 with gcc (GCC) 8.1.0 all runs: crashed: WARNING in bdev_read # git bisect bad 329101244f214952606359d254ae883b7109e1a5 Bisecting: 36 revisions left to test after this (roughly 5 steps) [eac53016919f2d2a8df607c69dc2b1d47273a61e] staging: rtl8723bs: hal: Drop condition with no effect testing commit eac53016919f2d2a8df607c69dc2b1d47273a61e with gcc (GCC) 8.1.0 all runs: OK # git bisect good eac53016919f2d2a8df607c69dc2b1d47273a61e Bisecting: 18 revisions left to test after this (roughly 4 steps) [8465def499c70d041a234087eff380108da7e830] staging: greybus: move the greybus core to drivers/greybus testing commit 8465def499c70d041a234087eff380108da7e830 with gcc (GCC) 8.1.0 all runs: OK # git bisect good 8465def499c70d041a234087eff380108da7e830 Bisecting: 9 revisions left to test after this (roughly 3 steps) [097a802ae15e2c6d17256a6fe0712a655ba10823] erofs: reduntant assignment in __erofs_get_meta_page() testing commit 097a802ae15e2c6d17256a6fe0712a655ba10823 with gcc (GCC) 8.1.0 all runs: crashed: WARNING in bdev_read # git bisect bad 097a802ae15e2c6d17256a6fe0712a655ba10823 Bisecting: 4 revisions left to test after this (roughly 2 steps) [a1617c8c3d39b1348e72d04548229e2ed9bf8121] staging: rtl8192u: Fix indentation testing commit a1617c8c3d39b1348e72d04548229e2ed9bf8121 with gcc (GCC) 8.1.0 all runs: OK # git bisect good a1617c8c3d39b1348e72d04548229e2ed9bf8121 Bisecting: 2 revisions left to test after this (roughly 1 step) [c48c9f7ff32b8b3965a08e40eb6763682d905b5d] staging: exfat: add exfat filesystem code to staging testing commit c48c9f7ff32b8b3965a08e40eb6763682d905b5d with gcc (GCC) 8.1.0 all runs: crashed: WARNING in bdev_read # git bisect bad c48c9f7ff32b8b3965a08e40eb6763682d905b5d Bisecting: 0 revisions left to test after this (roughly 0 steps) [3982f1df00df57768f0782bc702fc4fbea347ca2] staging: most: sound: Fix error path of audio_init testing commit 3982f1df00df57768f0782bc702fc4fbea347ca2 with gcc (GCC) 8.1.0 all runs: OK # git bisect good 3982f1df00df57768f0782bc702fc4fbea347ca2 c48c9f7ff32b8b3965a08e40eb6763682d905b5d is the first bad commit commit c48c9f7ff32b8b3965a08e40eb6763682d905b5d Author: Valdis Klētnieks Date: Wed Aug 28 18:08:17 2019 +0200 staging: exfat: add exfat filesystem code to staging The exfat code needs a lot of work to get it into "real" shape for the fs/ part of the kernel, so put it into drivers/staging/ for now so that it can be worked on by everyone in the community. The full specification of the filesystem can be found at: https://docs.microsoft.com/en-us/windows/win32/fileio/exfat-specification Signed-off-by: Valdis Kletnieks Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman Link: https://lore.kernel.org/r/20190828160817.6250-1-gregkh@linuxfoundation.org Signed-off-by: Greg Kroah-Hartman :100644 100644 e3242687cd192f4cd3e4a2d0458fc03712b870f7 a484b36e51177cb15770eaafaa391c3fa4a62f4e M MAINTAINERS :040000 040000 a6432e9402ce0695622bebdb4a08bcd7a68dbd5b 8a1379be635a5e375b431f83945324a4ce74100d M drivers revisions tested: 17, total time: 3h47m38.665962116s (build: 1h41m29.85133279s, test: 2h0m27.928615979s) first bad commit: c48c9f7ff32b8b3965a08e40eb6763682d905b5d staging: exfat: add exfat filesystem code to staging cc: ["alexander.levin@microsoft.com" "davem@davemloft.net" "devel@driverdev.osuosl.org" "gregkh@linuxfoundation.org" "linux-kernel@vger.kernel.org" "mchehab+samsung@kernel.org" "valdis.kletnieks@vt.edu"] crash: WARNING in bdev_read ------------[ cut here ]------------ [EXFAT] No bh, device seems wrong or to be ejected. WARNING: CPU: 1 PID: 9095 at drivers/staging/exfat/exfat_blkdev.c:63 bdev_read+0x1de/0x290 drivers/staging/exfat/exfat_blkdev.c:62 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 9095 Comm: syz-executor.2 Not tainted 5.3.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x113/0x167 lib/dump_stack.c:113 panic+0x223/0x4dc kernel/panic.c:219 __warn.cold.10+0x1b/0x37 kernel/panic.c:576 report_bug+0x1a4/0x200 lib/bug.c:186 fixup_bug arch/x86/kernel/traps.c:179 [inline] do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:272 do_invalid_op+0x36/0x40 arch/x86/kernel/traps.c:291 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1028 RIP: 0010:bdev_read+0x1de/0x290 drivers/staging/exfat/exfat_blkdev.c:62 Code: c1 e9 03 80 3c 11 00 74 8a 4c 89 ef 48 89 45 d8 e8 67 97 90 fc 48 8b 45 d8 e9 75 ff ff ff 48 c7 c7 40 8a 92 87 e8 24 44 34 fc <0f> 0b eb ab 44 89 45 d0 48 89 75 d8 e8 41 96 90 fc 44 8b 45 d0 48 RSP: 0018:ffff888089d7fa90 EFLAGS: 00010282 RAX: 0000000000000000 RBX: ffff888086c00500 RCX: 0000000000000000 RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffffffff89da0800 RBP: ffff888089d7fac8 R08: fffffbfff11f4b20 R09: fffffbfff11f4b20 R10: fffffbfff11f4b1f R11: ffffffff88fa58ff R12: ffff8880a5044280 R13: ffff888089d7fbb0 R14: 0000000000000001 R15: 0000000000000200 sector_read+0x102/0x210 drivers/staging/exfat/exfat_core.c:3618 ffsMountVol drivers/staging/exfat/exfat_super.c:466 [inline] exfat_fill_super.cold.46+0x4d6/0xc7f drivers/staging/exfat/exfat_super.c:3956 mount_bdev+0x278/0x330 fs/super.c:1283 exfat_fs_mount+0x10/0x20 drivers/staging/exfat/exfat_super.c:4023 legacy_get_tree+0x101/0x1f0 fs/fs_context.c:661 vfs_get_tree+0x86/0x350 fs/super.c:1413 do_new_mount fs/namespace.c:2791 [inline] do_mount+0x10fa/0x1b60 fs/namespace.c:3111 ksys_mount+0xba/0xe0 fs/namespace.c:3320 __do_sys_mount fs/namespace.c:3334 [inline] __se_sys_mount fs/namespace.c:3331 [inline] __x64_sys_mount+0xb9/0x150 fs/namespace.c:3331 do_syscall_64+0xd0/0x540 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45a639 Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fa378111c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 000000000045a639 RDX: 0000000020000080 RSI: 0000000020000180 RDI: 0000000020000000 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000004000 R11: 0000000000000246 R12: 00007fa3781126d4 R13: 00000000004c71f8 R14: 00000000004dcbc8 R15: 00000000ffffffff Kernel Offset: disabled Rebooting in 86400 seconds..